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btrfs: use cached value of fs_info::csum_size everywhere

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btrfs_get_16 shows up in the system performance profiles (helper to read
16bit values from on-disk structures). This is partially because of the
checksum size that's frequently read along with data reads/writes, other
u16 uses are from item size or directory entries.

Replace all calls to btrfs_super_csum_size by the cached value from
fs_info.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2020-06-30 02:01:31 +02:00
parent fe5ecbe818
commit 55fc29bed8
11 changed files with 23 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/btrfs/btrfs_inode.h
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@ -331,8 +331,7 @@ static inline void btrfs_print_data_csum_error(struct btrfs_inode *inode,
u64 logical_start, u8 *csum, u8 *csum_expected, int mirror_num)
{
struct btrfs_root *root = inode->root;
struct btrfs_super_block *sb = root->fs_info->super_copy;
const u16 csum_size = btrfs_super_csum_size(sb);
const u16 csum_size = root->fs_info->csum_size;
/* Output minus objectid, which is more meaningful */
if (root->root_key.objectid >= BTRFS_LAST_FREE_OBJECTID)

2
fs/btrfs/check-integrity.c
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@ -660,7 +660,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
return -1;
}
state->csum_size = btrfs_super_csum_size(selected_super);
state->csum_size = state->fs_info->csum_size;
for (pass = 0; pass < 3; pass++) {
int num_copies;

6
fs/btrfs/compression.c
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@ -131,7 +131,7 @@ static int btrfs_decompress_bio(struct compressed_bio *cb);
static inline int compressed_bio_size(struct btrfs_fs_info *fs_info,
unsigned long disk_size)
{
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
return sizeof(struct compressed_bio) +
(DIV_ROUND_UP(disk_size, fs_info->sectorsize)) * csum_size;
@ -142,7 +142,7 @@ static int check_compressed_csum(struct btrfs_inode *inode, struct bio *bio,
{
struct btrfs_fs_info *fs_info = inode->root->fs_info;
SHASH_DESC_ON_STACK(shash, fs_info->csum_shash);
const u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
struct page *page;
unsigned long i;
char *kaddr;
@ -628,7 +628,7 @@ blk_status_t btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
struct extent_map *em;
blk_status_t ret = BLK_STS_RESOURCE;
int faili = 0;
const u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
u8 *sums;
em_tree = &BTRFS_I(inode)->extent_tree;

6
fs/btrfs/disk-io.c
View File

@ -321,7 +321,7 @@ static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info,
crypto_shash_digest(shash, raw_disk_sb + BTRFS_CSUM_SIZE,
BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE, result);
if (memcmp(disk_sb->csum, result, btrfs_super_csum_size(disk_sb)))
if (memcmp(disk_sb->csum, result, fs_info->csum_size))
return 1;
return 0;
@ -454,7 +454,7 @@ static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page)
u64 start = page_offset(page);
u64 found_start;
u8 result[BTRFS_CSUM_SIZE];
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
struct extent_buffer *eb;
int ret;
@ -543,7 +543,7 @@ int btrfs_validate_metadata_buffer(struct btrfs_io_bio *io_bio, u64 phy_offset,
eb = (struct extent_buffer *)page->private;
fs_info = eb->fs_info;
csum_size = btrfs_super_csum_size(fs_info->super_copy);
csum_size = fs_info->csum_size;
/* the pending IO might have been the only thing that kept this buffer
* in memory. Make sure we have a ref for all this other checks

2
fs/btrfs/extent_io.c
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@ -2689,7 +2689,7 @@ blk_status_t btrfs_submit_read_repair(struct inode *inode,
repair_bio->bi_private = failed_bio->bi_private;
if (failed_io_bio->csum) {
const u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
repair_io_bio->csum = repair_io_bio->csum_inline;
memcpy(repair_io_bio->csum,

14
fs/btrfs/file-item.c
View File

@ -181,7 +181,7 @@ btrfs_lookup_csum(struct btrfs_trans_handle *trans,
struct btrfs_csum_item *item;
struct extent_buffer *leaf;
u64 csum_offset = 0;
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
int csums_in_item;
file_key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
@ -270,7 +270,7 @@ blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
u32 diff;
int nblocks;
int count = 0;
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
if (!fs_info->csum_root || (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM))
return BLK_STS_OK;
@ -409,7 +409,7 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
int ret;
size_t size;
u64 csum_end;
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
ASSERT(IS_ALIGNED(start, fs_info->sectorsize) &&
IS_ALIGNED(end + 1, fs_info->sectorsize));
@ -540,7 +540,7 @@ blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
int i;
u64 offset;
unsigned nofs_flag;
const u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
nofs_flag = memalloc_nofs_save();
sums = kvzalloc(btrfs_ordered_sum_size(fs_info, bio->bi_iter.bi_size),
@ -638,7 +638,7 @@ static noinline void truncate_one_csum(struct btrfs_fs_info *fs_info,
u64 bytenr, u64 len)
{
struct extent_buffer *leaf;
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
u64 csum_end;
u64 end_byte = bytenr + len;
u32 blocksize_bits = fs_info->sectorsize_bits;
@ -692,7 +692,7 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans,
u64 csum_end;
struct extent_buffer *leaf;
int ret;
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
u32 blocksize_bits = fs_info->sectorsize_bits;
ASSERT(root == fs_info->csum_root ||
@ -847,7 +847,7 @@ int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
int index = 0;
int found_next;
int ret;
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
path = btrfs_alloc_path();
if (!path)

6
fs/btrfs/inode.c
View File

@ -2906,7 +2906,7 @@ static int check_data_csum(struct inode *inode, struct btrfs_io_bio *io_bio,
SHASH_DESC_ON_STACK(shash, fs_info->csum_shash);
char *kaddr;
u32 len = fs_info->sectorsize;
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
u8 *csum_expected;
u8 csum[BTRFS_CSUM_SIZE];
@ -7825,7 +7825,7 @@ static inline blk_status_t btrfs_submit_dio_bio(struct bio *bio,
csum_offset = file_offset - dip->logical_offset;
csum_offset >>= fs_info->sectorsize_bits;
csum_offset *= btrfs_super_csum_size(fs_info->super_copy);
csum_offset *= fs_info->csum_size;
btrfs_io_bio(bio)->csum = dip->csums + csum_offset;
}
map:
@ -7850,7 +7850,7 @@ static struct btrfs_dio_private *btrfs_create_dio_private(struct bio *dio_bio,
dip_size = sizeof(*dip);
if (!write && csum) {
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
const u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
size_t nblocks;
nblocks = dio_bio->bi_iter.bi_size >> fs_info->sectorsize_bits;

2
fs/btrfs/ordered-data.c
View File

@ -868,7 +868,7 @@ int btrfs_find_ordered_sum(struct btrfs_inode *inode, u64 offset,
struct btrfs_ordered_inode_tree *tree = &inode->ordered_tree;
unsigned long num_sectors;
unsigned long i;
const u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
int index = 0;
ordered = btrfs_lookup_ordered_extent(inode, offset);

2
fs/btrfs/ordered-data.h
View File

@ -137,7 +137,7 @@ static inline int btrfs_ordered_sum_size(struct btrfs_fs_info *fs_info,
unsigned long bytes)
{
int num_sectors = (int)DIV_ROUND_UP(bytes, fs_info->sectorsize);
int csum_size = btrfs_super_csum_size(fs_info->super_copy);
const u16 csum_size = fs_info->csum_size;
return sizeof(struct btrfs_ordered_sum) + num_sectors * csum_size;
}

2
fs/btrfs/scrub.c
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@ -610,7 +610,7 @@ static noinline_for_stack struct scrub_ctx *scrub_setup_ctx(
atomic_set(&sctx->bios_in_flight, 0);
atomic_set(&sctx->workers_pending, 0);
atomic_set(&sctx->cancel_req, 0);
sctx->csum_size = btrfs_super_csum_size(fs_info->super_copy);
sctx->csum_size = fs_info->csum_size;
spin_lock_init(&sctx->list_lock);
spin_lock_init(&sctx->stat_lock);

2
fs/btrfs/tree-checker.c
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@ -336,7 +336,7 @@ static int check_csum_item(struct extent_buffer *leaf, struct btrfs_key *key,
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
u32 sectorsize = fs_info->sectorsize;
u32 csumsize = btrfs_super_csum_size(fs_info->super_copy);
const u16 csumsize = fs_info->csum_size;
if (key->objectid != BTRFS_EXTENT_CSUM_OBJECTID) {
generic_err(leaf, slot,